title: (S)-(-)-(2-MeBu)N(Pr)₂MeI salt as template in the enantioselective synthesis of the enantiopure two-dimensional (S)-(-)-(2-MeBu)N(Pr)₂Me[ΛMnΔCr(C₂O₄)₃] ferromagnet.
abstract: We describe herein the synthesis of (rac)- or enantiopure (S)-(-)-(2-MeBu)N(Pr)₂MeI ammonium salts. These racemic and enantiopure ammonium salts were used as cationic templates to obtain new two-dimensional (2D) ferromagnets [(rac)-(2-MeBu)N(Pr)₂Me][MnCr(C₂O₄)₃] and [(S)-(-)-(2-MeBu)N(Pr)₂Me][ΔMnΛ nCr(C₂O₄)₃]. The absolute configuration of the hexacoordinated Cr(III) metallic ion in the enantiopure 2D network was determined by a circular dichroism measurement. The structure of [(2-MeBu)N(Pr)₂Me][MnCr(C₂O₄)₃], established by single crystal X-ray diffraction, belongs to the chiral P63 space group. According to direct current (dc) magnetic measurements, these compounds are ferrromagnets with a temperature Tc = 6°K.
authors.affiliation: Institut Parisien de Chimie Moléculaire UMR-CNRS 7201, Université P. M. Curie, 4 place Jussieu, case 42, 75252 Paris Cedex, France. michel.gruselle@upmc.fr
authors.forename: Michel
authors.initials: M
authors.lastname: Gruselle
authors.forename: Yanling
authors.initials: Y
authors.lastname: Li
authors.forename: Nikolay
authors.initials: N
authors.lastname: Ovanesyan
authors.forename: Viktor
authors.initials: V
authors.lastname: Makhaev
authors.forename: Gennadi
authors.initials: G
authors.lastname: Shilov
authors.forename: Fedor
authors.initials: F
authors.lastname: Mushenok
authors.forename: Cyrille
authors.initials: C
authors.lastname: Train
authors.forename: Serguey
authors.initials: S
authors.lastname: Aldoshin
keywords: 2D chiral networks; ammonium salts; ferromagnets